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Side by Side Diff: Source/WTF/wtf/DateMath.h

Issue 14238015: Move Source/WTF/wtf to Source/wtf (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Created 7 years, 8 months ago
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1 /*
2 * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
3 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
4 * Copyright (C) 2009 Google Inc. All rights reserved.
5 * Copyright (C) 2010 Research In Motion Limited. All rights reserved.
6 *
7 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
8 *
9 * The contents of this file are subject to the Mozilla Public License Version
10 * 1.1 (the "License"); you may not use this file except in compliance with
11 * the License. You may obtain a copy of the License at
12 * http://www.mozilla.org/MPL/
13 *
14 * Software distributed under the License is distributed on an "AS IS" basis,
15 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
16 * for the specific language governing rights and limitations under the
17 * License.
18 *
19 * The Original Code is Mozilla Communicator client code, released
20 * March 31, 1998.
21 *
22 * The Initial Developer of the Original Code is
23 * Netscape Communications Corporation.
24 * Portions created by the Initial Developer are Copyright (C) 1998
25 * the Initial Developer. All Rights Reserved.
26 *
27 * Contributor(s):
28 *
29 * Alternatively, the contents of this file may be used under the terms of
30 * either of the GNU General Public License Version 2 or later (the "GPL"),
31 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
32 * in which case the provisions of the GPL or the LGPL are applicable instead
33 * of those above. If you wish to allow use of your version of this file only
34 * under the terms of either the GPL or the LGPL, and not to allow others to
35 * use your version of this file under the terms of the MPL, indicate your
36 * decision by deleting the provisions above and replace them with the notice
37 * and other provisions required by the GPL or the LGPL. If you do not delete
38 * the provisions above, a recipient may use your version of this file under
39 * the terms of any one of the MPL, the GPL or the LGPL.
40 *
41 */
42
43 #ifndef DateMath_h
44 #define DateMath_h
45
46 #include <math.h>
47 #include <stdint.h>
48 #include <string.h>
49 #include <time.h>
50 #include <wtf/CurrentTime.h>
51 #include <wtf/Noncopyable.h>
52 #include <wtf/OwnArrayPtr.h>
53 #include <wtf/PassOwnArrayPtr.h>
54 #include <wtf/text/WTFString.h>
55 #include <wtf/UnusedParam.h>
56
57 namespace WTF {
58
59 void initializeDates();
60 int equivalentYearForDST(int year);
61
62 // Not really math related, but this is currently the only shared place to put t hese.
63 double parseES5DateFromNullTerminatedCharacters(const char* dateString);
64 WTF_EXPORT_PRIVATE double parseDateFromNullTerminatedCharacters(const char* date String);
65 double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveT Z, int& offset);
66 double timeClip(double);
67 // dayOfWeek: [0, 6] 0 being Monday, day: [1, 31], month: [0, 11], year: ex: 201 1, hours: [0, 23], minutes: [0, 59], seconds: [0, 59], utcOffset: [-720,720].
68 String makeRFC2822DateString(unsigned dayOfWeek, unsigned day, unsigned month, u nsigned year, unsigned hours, unsigned minutes, unsigned seconds, int utcOffset) ;
69
70 inline double jsCurrentTime()
71 {
72 // JavaScript doesn't recognize fractions of a millisecond.
73 return floor(WTF::currentTimeMS());
74 }
75
76 const char* const weekdayName[7] = { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", " Sun" };
77 const char* const monthName[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "J ul", "Aug", "Sep", "Oct", "Nov", "Dec" };
78 const char* const monthFullName[12] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
79
80 const double hoursPerDay = 24.0;
81 const double minutesPerHour = 60.0;
82 const double secondsPerHour = 60.0 * 60.0;
83 const double secondsPerMinute = 60.0;
84 const double msPerSecond = 1000.0;
85 const double msPerMinute = 60.0 * 1000.0;
86 const double msPerHour = 60.0 * 60.0 * 1000.0;
87 const double msPerDay = 24.0 * 60.0 * 60.0 * 1000.0;
88 const double msPerMonth = 2592000000.0;
89
90 bool isLeapYear(int year);
91
92 // Returns the number of days from 1970-01-01 to the specified date.
93 WTF_EXPORT_PRIVATE double dateToDaysFrom1970(int year, int month, int day);
94 WTF_EXPORT_PRIVATE int msToYear(double ms);
95 double msToDays(double ms);
96 int msToMinutes(double ms);
97 int msToHours(double ms);
98 int dayInYear(int year, int month, int day);
99 WTF_EXPORT_PRIVATE int dayInYear(double ms, int year);
100 WTF_EXPORT_PRIVATE int monthFromDayInYear(int dayInYear, bool leapYear);
101 WTF_EXPORT_PRIVATE int dayInMonthFromDayInYear(int dayInYear, bool leapYear);
102
103 // Returns offset milliseconds for UTC and DST.
104 WTF_EXPORT_PRIVATE int32_t calculateUTCOffset();
105 WTF_EXPORT_PRIVATE double calculateDSTOffset(double ms, double utcOffset);
106
107 } // namespace WTF
108
109 using WTF::isLeapYear;
110 using WTF::dateToDaysFrom1970;
111 using WTF::dayInMonthFromDayInYear;
112 using WTF::dayInYear;
113 using WTF::minutesPerHour;
114 using WTF::monthFromDayInYear;
115 using WTF::msPerDay;
116 using WTF::msPerHour;
117 using WTF::msPerMinute;
118 using WTF::msPerSecond;
119 using WTF::msToYear;
120 using WTF::msToDays;
121 using WTF::msToMinutes;
122 using WTF::msToHours;
123 using WTF::secondsPerMinute;
124 using WTF::parseDateFromNullTerminatedCharacters;
125 using WTF::makeRFC2822DateString;
126 using WTF::calculateUTCOffset;
127 using WTF::calculateDSTOffset;
128
129 #endif // DateMath_h
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